c8051f020的温度传感器的具体用法

2025-03-04 19:32:32
推荐回答(2个)
回答1:

// 此程序为ADC0的应用例程 在中断模式使用定时器3溢出
// 作为开始转换信号来测量片内温度传感器
// ADC0的结果经过计算得到温度值显示在lcd1602液晶上
//
// 假设在XTAL1和XTAL2之间连接一个22.1184MHz晶体
//
// 系统时钟频率存储在全局常量SYSCLK

// ADC0采样率存储在全局常量SAMPLERATE0
//
// 目标器件: C8051F02x
// 链接工具 KEIL C51 6.03 / KEIL EVAL C51
//
//-----------------------------------------------------------------------------
// 包含文件
//-----------------------------------------------------------------------------
#include // SFR声明
#include
//-----------------------------------------------------------------------------
// C8051F02X的16位SFR定义
//-----------------------------------------------------------------------------
sfr16 DP = 0x82; // 数据指针
sfr16 TMR3RL = 0x92; // 定时器3重装值
sfr16 TMR3 = 0x94; // 定时器3计数器
sfr16 ADC0 = 0xbe; // ADC0数据
sfr16 ADC0GT = 0xc4; // ADC0大于窗口
sfr16 ADC0LT = 0xc6; // ADC0小于窗口
sfr16 RCAP2 = 0xca; // 定时器2捕捉/重装
sfr16 T2 = 0xcc; // 定时器2
sfr16 RCAP4 = 0xe4; // 定时器4捕捉/重装
sfr16 T4 = 0xf4; // 定时器4
sfr16 DAC0 = 0xd2; // DAC0数据
sfr16 DAC1 = 0xd5; // DAC1数据
//-----------------------------------------------------------------------------
// 全局常量
//-----------------------------------------------------------------------------
#define SYSCLK 22118400 // 系统时钟频率 Hz
#define BAUDRATE 9600 // UART波特率 bps
#define SAMPLERATE0 50000 // ADC0采样频率 Hz
#define uchar unsigned char
#define uint unsigned int
#define DataPort P2
sbit RS=P3^0;
sbit RW=P3^1;
sbit EN=P3^2;
sbit LED = P3^4; // LED=’1’ 意为ON
uchar code str1[]={"temperature: "};
uchar code str2[]={" "};
uchar data disdata[6];
uchar tflag;//温度正负标志
long temperature; // 温度为百分之一精度 度C
int temp_int, temp_frac; // 温度的整数和小数部分

//-----------------------------------------------------------------------------
// 函数原型
//-----------------------------------------------------------------------------
void SYSCLK_Init (void);
void PORT_Init (void);
void ADC0_Init (void);
void Timer3_Init (int counts);
void ADC0_ISR (void);
void delayms(uint ms);
void wr_com(uchar com);
void wr_dat(uchar dat);
void lcd_init();
void display(uchar *p);
void Temp_dsplay();
init_play();

//--------------------------------------------------------------
void delayms(uint ms) //延时程序
{ uint i,j;
for(i=0;i for(j=0;j<100;j++);
}
//-------------------------------------------------------
void wr_com(uchar com)//写指令
{ delayms(1);
RS=0;
RW=0;
EN=0;
DataPort=com;
delayms(50);
EN=1;
delayms(50);
EN=0;
}
//----------------------------------------------------------------------
void wr_dat(uchar dat)//写数据//
{ delayms(1);;
RS=1;
RW=0;
EN=0;
DataPort=dat;
delayms(50);
EN=1;
delayms(50);
EN=0;
}
//-------------------------------------------------------------------
void lcd_init()//初始化设置//
{delayms(15);
wr_com(0x38);delayms(5);
wr_com(0x08);delayms(5);
wr_com(0x01);delayms(5);
wr_com(0x06);delayms(5);
wr_com(0x0c);delayms(5);
}
//---------------------------------------------------------
void display(uchar *p)//显示//
{
while(*p!='\0')
{
wr_dat(*p);
p++;
delayms(1);
}
}
//-----------------------------------------------------
init_play()//初始化显示
{ lcd_init();
wr_com(0x80);
display(str1);
wr_com(0xc0);
display(str2);
}
//-------------------------------------------------------
void Temp_dsplay()//温度值显示
{ uchar flagdat;
disdata[0]=temp_int/100+0x30;//百位数
disdata[1]=temp_int%100/10+0x30;//十位数
disdata[2]=temp_int%10+0x30;//个位数
disdata[3]=temp_frac/10+0x30;//小数位1
disdata[4]=temp_frac%10+0x30;//小数位2

if(tflag==0)
flagdat=0x20;//正温度不显示符号
else
flagdat=0x2d;//负温度显示负号:-
if(disdata[0]==0x30)
{disdata[0]=0x20;//如果百位为0,不显示
if(disdata[1]==0x30)
{disdata[1]=0x20;//如果百位为0,十位为0也不显示
}
}
wr_com(0xc0);
wr_dat(flagdat);//显示符号位
wr_com(0xc1);
wr_dat(disdata[0]);//显示百位
wr_com(0xc2);
wr_dat(disdata[1]);//显示十位
wr_com(0xc3);
wr_dat(disdata[2]);//显示个位
wr_com(0xc4);
wr_dat(0x2e);//显示小数点
wr_com(0xc5);
wr_dat(disdata[3]);//显示小数位
wr_com(0xc6);
wr_dat(disdata[4]);//显示小数位
}
//-----------------------------------------------------------------------------
// 全局变炼
//-----------------------------------------------------------------------------
long result; // ADC0 十选一值
//-----------------------------------------------------------------------------
// 主程序
//-----------------------------------------------------------------------------
void main (void)
{

WDTCN = 0xde; // 禁止看门狗定时器
WDTCN = 0xad;

SYSCLK_Init (); // 初始化振荡器
PORT_Init (); // 初始化数据交叉开关和通用IO口
Timer3_Init (SYSCLK/SAMPLERATE0); // 初始化定时器3溢出作为采样速率
ADC0_Init (); // 初始化ADC
lcd_init();
init_play();//初始化显示
AD0EN = 1; // 使能ADC
EA = 1; // 允许全局中断
while (1)
{
EA = 0; // 禁止中断
temperature = result; // 从全局变量得到ADC值
EA = 1; // 重新允许中断
// 计算温度误差为百分之一度
temperature = temperature - 41380;
temperature = (temperature * 100L) / 156;
temp_int = temperature / 100;
temp_frac = temperature - (temp_int * 100);
Temp_dsplay();
}
}
//-----------------------------------------------------------------------------
// 初始化子程序
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// 系统时钟初始化
//-----------------------------------------------------------------------------
//
// 此程序初始化系统时钟 使用22.1184MHz晶体作为时钟源
//
void SYSCLK_Init (void)
{
int i; // 延时计数器
OSCXCN = 0x67; // 起动外部振荡器晶体为 22.1184MHz
for (i=0; i < 256; i++) ; // 等待振荡器启动(>1ms)
while (!(OSCXCN & 0x80)) ; // 等待晶体振荡器稳定
OSCICN = 0x88; // 选择外部振荡器作为系统时钟源并使能丢失时钟检测器
}
//-----------------------------------------------------------------------------
// IO口初始化
//-----------------------------------------------------------------------------
//
// 配置数据交叉开关和通用IO口
//
void PORT_Init (void)
{

XBR1 = 0x00;
XBR2 = 0x40; // 允许数据交叉开关和弱上拉

P2MDOUT |= 0xff;
P3MDOUT |= 0xff;// 允许P3.4(LED)为推挽输出P3.0,P3.1,P3.2推挽输出
}
//-----------------------------------------------------------------------------

//-----------------------------------------------------------------------------
// ADC0初始化
//-----------------------------------------------------------------------------
//
// 配置ADC0 使用定时器3溢出作为转换源,转换结束产生中断
// 使用左对齐输出模式 使能ADC转换结束中断 禁止ADC
//
void ADC0_Init (void)
{
ADC0CN = 0x05; // 禁止ADC0; 正常跟踪模式
// 定时器3溢出ADC0开始转换 ADC0数据左对齐
REF0CN = 0x07; // 使能温度传感器, 片内 VREF和VREF 输出缓冲器
AMX0SL = 0x0f; // 选择温度传感器作为ADC为多路模拟输出
ADC0CF = (SYSCLK/2500000) << 3; // ADC 转换时钟=2.5MHz
ADC0CF |= 0x01; // PGA增益=2
EIE2 |= 0x02; // 允许ADC中断
}
//-----------------------------------------------------------------------------
// 定时器3初始化
//-----------------------------------------------------------------------------
//
// 配置定时器3为自动重装 时间间隔由 制定(不产生中断)
// 使用系统时钟作为时基.
//
void Timer3_Init (int counts)
{
TMR3CN = 0x02; // 停止定时器3; 清除TF3;
// 使用系统时钟作为时基
TMR3RL = -counts; // 初始化重装值
TMR3 = 0xffff; // 设置立即重装值
EIE2 &= ~0x01; // 禁止定时器3中断
TMR3CN |= 0x04; // 起动定时器3
}
//-----------------------------------------------------------------------------
// 中断服务程序
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// ADC0中断服务程序
//-----------------------------------------------------------------------------
//
// ADC0转换结束中断服务程序
// 我们将ADC0取样结果存储在全局变量.
//
void ADC0_ISR (void) interrupt 15
{
AD0INT = 0; // ADC转换结束清除标志
result = ADC0; // 读ADC值
}
这是我修改的一个使用内部温度传感器的程序,做过测试可以用,你可以参考一下。

回答2:

AD转换开启,使工作为温度传感器的选择通道。同时把寄存器REF0CN中的温度传感器开启,其他和正常AD转换一样。。。试一试。。。。你会成功的。。

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